IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'People' AND  COLUMN_NAME = 'EconomicCode')
begin
	alter table dbo.People add EconomicCode	nvarchar(200) null
end
;
IF not EXISTS( SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 'People' AND  COLUMN_NAME = 'PostalCode')
begin
	alter table dbo.People add PostalCode	nvarchar(200) null
end